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NOTICE

A source can be normalized only if each phase has mea surable voltage and 
its sequence of rotation is the same as on the other source . If normalizing 
can’t be performed, one of the following messages will be displayed: 
CANNOT NORMALIZE                                                         CANNOT NORMALIZE 

PHASE VOLT(S) TOO LOW                             OPPOSITE PHASE ROTATION 
If either of these messages is displayed, contact your  nearest S&C Sales 
Office . 

(e)  Set the base voltages on Phase 2 of the left and right sources. 

Note: 

Each source should be in its known normal state so unusual system 

conditions aren’t calibrated out. 

Here, for example, is the display for

 CONFIG:  SET BASE LEFT 

with 

its factory setting, 

120 Volts:

E

CONFIG:   

E

SET

E

BASE

E

LEFT

E

120

E  

VOLTS

EEEEEEEEE

CHANGE

If the left-source base voltage is to be set to some other value, press the 

<Change> key. If the dis play prompts you to reenter the access code num-
ber, do so. The display will now look like this:

E

CONFIG:   

E

SET

E

BASE

E

LEFT

E

120

E  

VOLTS

EEEEEEEEE

_____

Enter the desired left-source base voltage. If, for example, 117 volts is the 

desired value, the <1>, <1>, and <7> keys would be pressed—followed by the  
<Enter> key. The display will change to:

E

CONFIG:   

E

SET

E

BASE

E

LEFT

E

117

E  

VOLTS

EEEEEEEEE

CHANGE

Set the right-source base voltage the same way.

(f)  The Micro-AT control can be programmed to accept a custom access code 

number of your choosing, using the following procedure.

 

Note: 

If you don’t wish to enter a custom access-code number, proceed 

to Step 2(g). 

Here’s the display for

 CONFIG: ACCESS CODES:

   

CONFIG:   

E

ACCESS CODES

 CHANGE

Press the <Change> key. The following will be displayed:

   

CONFIG:

E

ACCESS CODES

ENTER ACCESS

E

CODE _

Press each digit of the standard access code number, and then press the 

<Enter> key. The display will change to:

   

CONFIG:

E

ACCESS CODES

USER

E

ENTER

E

NEW

E

CODE _

Enter the desired custom access code number (4 digits minimum, 7 digits 

maximum). The display will change to:

   

CONFIG:   

E

ACCESS CODES

USER

 

REENTER

E

NEW

E

CODE _

or

Quick-Start Programming

8    S&C Instruction Sheet 515-530

Summary of Contents for Micro-AT

Page 1: ...uction Sheet 2 Proper Application 2 Warranty 2 Safety Information Understanding Safety Alert Messages 3 Following Safety Instructions 3 Replacement Instructions and Labels 3 Safety Precautions 4 Quick...

Page 2: ...gnate a location where it can be easily retrieved and refer to Proper Application WARNING The equipment in this publication is only intended for a specific application The application must be within t...

Page 3: ...ecautions are not followed NOTICE NOTICE identifies important procedures or requirements that can result in product or property damage if instructions are not followed Following Safety Instructions If...

Page 4: ...h clothing in accordance with safe operating procedures and rules 4 SAFETY LABELS Do not remove or obscure any of the DANGER WARNING CAUTION or NOTICE labels 5 OPERATING MECHANISMS Do not remove or di...

Page 5: ...Next item key before the Quit key NOTICE When changing the Select Bus Type or Select Preferred settings in the Configure menu the Micro AT control will power down and reboot A System Startup event wi...

Page 6: ...n factory set for the 4 Wire voltage sensing setting PRESS ENTER NORMALIZE RIGHT Means of compensating for any output voltage magnitude unbal ance and or phase angle unbalance between voltage sensing...

Page 7: ...EEEEEEEEECHANGE The other field adjustable items of the Configure menu can be changed in the same manner Procedures for normalizing the left and right sources setting the base voltages on the left and...

Page 8: ...ll now look like this ECONFIG ESETEBASEELEFT E120E VOLTSEEEEEEEEE_____ Enter the desired left source base voltage If for example 117 volts is the desiredvalue the 1 1 and 7 keyswouldbepressed followed...

Page 9: ...th the communi cations card proceed to Step 3 Here s the display for CONFIG COM BIT RATE with its factory setting 19200 BITS PER SECOND CONFIG ECOME0EBITERATE E19200EEEEEEEEEEEEECHANGE Ifadifferentdat...

Page 10: ...ear which if equaled or exceeded will result in control initiating auto matic transfer Also if the Hold return setting has been selected unbal ance level on alternate source or unbalance level on sour...

Page 11: ...f the lockout level is to be set to some other value press the Change key If the display prompts that the access code number to be reentered do so The display will now look like this CURRENT LOCKOUT L...

Page 12: ...a time window in which an automatic return of source transfer can occur the window is adjustable from 1 minute to 3 hours Transfer will take place after the return of source time delay has expired pr...

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